ChairinMain said: "Five possible options here, ranked, I think, from most likely to least:
C. Show closes September 3rd, Oak graciously agrees to finish out his originally-contracted run despite being totally within his rights to take the money and run.
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Is it really up to Oak though whether he continues past the 13th? Perhaps this is an innacurate assumption, but since they agreed to pay out his contract, I'm guessing they didn't go back and alter it, which means he's technically still contracted through September 3rd. So if the producers were to say "We want you through September 3rd", his options would be A) Stay in the show or B) Quit but then forfeit those 3 weeks of pay.
Now I'm guessing if he didn't want to stay the producers would let him out and still pay him, knowing the PR nightmare they would face if they didn't, but technically they would be 100% within their rights to say he now has to go on through the 3rd (again, unless they actually did alter the contract instead of just agreeing to pay it out).